xconomy.com -- Bellevue, WA-based PhysioSonics raised $2 million in equity funding from undisclosed investors, as Luke reported. The maker of ultrasound technology for monitoring blood flow in the brain, led by chief executive Brad Harlow, previously raised $4 million last June from Johnson & Johnson Development Corp. Its device is designed to help doctors track the effects of drugs in stroke patients and people with head injuries, as Luke wrote in a company profile.